Mold for concrete structures.



PATENTED, 0012s, 1906.

J. PRESTON. MOLD F011 CONCRETE STRUCTURES.

APPLICATION FILED OCT-9.1905.

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"110.833.8944. I PATENTED 0013.23, 190 I .J.'PRESTON.

MOLD FOR CONCRETE STRUCTURES.

" I APPLICATION EILBD 0019,1995.

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PATENTED OCT. 23, 1906-. J. PRESTON. MOLD FOR CONCRETE STRUCTURES.

APPLICATION FILED OOT.9. 1905.

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I UNITED STATES.

PATENT oFFIoE.

MOLD FOR coNcnETEsTRuc ruREs.

Be it known that I, JOHN PRESTON, a citizen of the United States, residing in the township of Walker, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Molds for Concrete Structures; and I do .hereby dee clarethe-following to be a full, clear, and ex* act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Invention relates to Improvements 111 M molds for concrete structures; and its object 18 to rovide a device adapted to form either .circu ar or angular structures with either tapered or. vertical walls and to provide the,

device with various new and useful features hereinafter more full described, and particularly pointed out in t e claims.

com ination and arrangement of a mast supported in the axis of the structure, a sleeve vertically movable on the mast and guided thereby, arms extending outward from the sleeve and attached thereto, molds adjustabl connected to the arms, means for raising an supporting the sleeve, arms, and molds step by step as the work progresses, and in various details of construction and arrangement, as hereinafter more fully described, reference being had to the accompanying drawings, in which Figure 1 1s a side elevation of a device e'm bodying my invention with portions in vertical section; Fig. 2, a plan view of the same with parts broken away Fig. 3, a side elevation' of a modified structure for forming tapered walls; Fig. 4, a plan view of the device adapted for square structures; Fig. 5, a.

detail of the anchorage and ad'ustment of the guys; Fig. 6, a detail of a spice or joint-in the mast; Fig. 7, a detail in perspective of a bracket .used In forming vertical walls Fig. 8,

the same of a bracket used in forming inclinedwalls, Fig. 9, a detail of the middle mold; Fig. 10,- an elevation. of the inner mold adapted for inserting studdin in. the wall; Fig. 11,-a detail of a detachab e clamp for holding the molds; Fig. 12, a detail of the material forming the vertical bond; Fig. 13, a detail of the lap-joint in the moldsfor inclined walls, and Fig. 14.a detail of one'of the horizontal bonds.

Like numbers refer to like parts ii; e11. er

the figures.

I Specification of Letters Patent. Application ,filed OctobeLQ, 1905'. Serial No. 281,946.

mast is adjusted vertically an Patented Oct. 23, 1906.

1 represents the mast, of tubular sections joined greferably formed I y an inner coup- .ling 1", screw-threaded and inserted in the abutting ends of the mast-sections. 2 represents guys connected to the upper end of the :mast and extending radially outward and downward therefrom to adjust and support the mast in vertical, position; i 3, anchorstakes for the guys; 4, turnbuckles for adjusting and tightening the gugs whereby the a vertical position. provided near its respective ends with flanges 6 and slidable on the mast; 7, radial arms,

six being shown, but the number maybe" more or less, said arms being attached to the lower flange 6 and extending outward therefrom to any desired distance, according to 7 the dimensions of the structure to be formed.- M invention consists, essentially, of the 8 represents braces extending from the upper flange 6 to the arms 7 to hold the same securely in a horizontal plane. 9 is a wmdlass -journaled in hangers mounted on the lower flange, upon which Windlass is wound a hoisting-tackle 10, connected at its lower end to the sleeve 5 and at its u per end to a cap 11,, mounted on the top of t e mast, to whic cap the guys 2 are attached.

Brackets 12 are adjustably attached tothe under side of the arm 7 by means of bolts 13,

rigidly held in 5 represents a sleeve which extend through elongated openings or slots 12 in the brackets and through openings 7 a in the arms 7, these openings bemg provided at frequent intervals, whereby they rackets may be radially adjusted at any desirable position on the arm 7. For walls preferably made rigid and rectangular, as in having verticalsurfaces these brackets are ig. 7, and are ad usted with their vertical members parallel and spaced apart to em brace the molds, which for circular work con-.. sist of an outer band 14 and an inner band 15 of less radius. supported by brackets 12 andenga e the m ner and outer surfaces of the vertica wall 20, which is 'Inolded-therebetween. To form a hollow wall and insert non-conducting mate-- rial, a third or middle band 16' is provided and 15, flanged at the to beneath each arm 7 a d secured thereto y bolts 17. This middle band supports the lining -18, referably of some non-conducting materia such as uilding-paper, which i placed on one or both sides of the andlplaced midway between the bands 14 nd'1'6, as

ning) may be These are attached to and I too preferred, and remains within the wall after the mold has been withdrawn.

Bondingdrons 19, Fig. 14, preferably consisting of short pieces of rod 19, bent at right angles near each end, are inserted to tie the walls, and to permit of such insertion the middle hoop 16-is recessed Or slotted at its under side to-near the middle thereof, as shown in Fig. 9 at 16. 20 represents a partially-constructed circular wall of concrete in process of construction. In. some instances it is desirable to further strengthen the wall by inserting therein bonding material arranged vertically. For this purpose lv prefer to use a flat braided wire structure 22, as shown in Fig. 12, and to insert this Withii; the wall I provide a number of reels 21, supported by brackets mounted on the arms 7, and on each reel is Wound a supply of said woven-wire material, which is automatically unwound therefrom as the molds are raised step by step to form the structure.

23 represents a casing for an opening in theside of the structure, which may be a door or window casing, as occasion may require, and as many may be inserted as deemed necessary. To support this casing, provide a clamp 24, vertically adjustable on the mast 1 and having oppositely-extending arms 24, to which are attached at one end stays 25, their other ends being attached to the casing 2f For this purpose I prefer, however, to use a device such as shown in Fig. 4, in which a horizontal bar 31 is adjustably secured to. the mast by a clip 32 and the stays 25, secured to the respective ends thereof and to the casing, as shown. In Fig. 3 is illustrated a modification whereby a wall with an inclined surface may be formed, in which the brackets 12 are provided, with hinge-joints 12 at their respective angles, whereby the vertical member of each bracket may be adjusted at any desired inclination from the true vertical position. To adapt the bands to assume an inclined position and also to adjust them to different diameters as the work progresses, they are divided vertically in'sections, with the ends overlapping each other, preferably one section. to each arm 7, and the outer overlapping portions are provided with longitudinal slots 14", in. which are bolts 14 adjustable therein and having countersunk heads within the inner overlapping ortion of the band. Fig. 4 shows a modiiie mold to be used in connection with my device for making structures with angular walls, the form shown being adaited for a rectangular structure or parallelogram form. The respective three members of the mold represented by 28, 29, and in this case are straight instead of curved and coir-reeled in any convenient manner at the corn For the purpose of inserting studding or strips of? wood at intervals, which may be partially embedded in the inner surface of the wall, I provide a modified inner member 29, having vertical channels or recesses 33 at regular intervals, in which said strips of wood or studding can be inserted and lel't partially embedded in the wall. To retain these straight molds from spreading, I may employ clamps composed of short beams 26, resting across the top of the molds and. having rectangular brac rets 27 attached thereto to embrace the molds and hold the same from spreading. These clam s present some obstructions in filling the molll, and in some cases I prefer to use truss-rods instead, as in Fig. 4, where 36 represents eyebolts in the respective ends of the mold member 28, through which eyebolts extends a rod 34, which engages struts'or braces 35, ilaced at intervals between the rod and the side of the in old, whereby the mold is supported without obstructing the il'illing of the same. Obviously the middle members 16 and 18 may be omitted and a solid wall formed.

My device can be used for forming a great variety of structures, either angular or circular, and more particularly such structures as silos, chimneys, stand-pipes for water, various angular buildings, and other like structures.

In the event that the brackets shown in Fig. 7 are used a strictly vertical wall is insured, as the molds are guided upward accurately step by step by the mast. In case the brackets of Fig. 8 are used and the brackets adjusted to form a tapered wall the mast also insures accurate adjustment step by step, it being only necessary to move the brackets inward and adjust the overlapping portions of the mold to conform to the reductionin diameter as the structure rises.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination of a mast, means for supporting and adjusting the mast, a sleeve vertically movable on the mast, radial arms attached to the sleeve, molds attached to the arms, and hoisting-tackle for vertically adjusting the sleeve.

2. The combination of a mast divided transversely, internal couplings connecting the section of the mast, guys supporting the mast, turnbuckles in the guys, a sleeve vertically movable on the mast, hoisting-tackle supporting the sleeve, radial arms attached to the sleeve and supported. thereby, brackets attached to the arms, and molds attached to the brackets.

3. The combination of a mast, a cap on the mast, guys attached to the cap, a sleeve movable on the mast, upper and lower flanges on the sleeve, radial arms attached to the lower flange, braces connecting the arms with the upper flange, hoist-ingtaclrle connecting the sleeve with the cap, a Windlass journaled in the hangers mounted on the sleeve, and molds attached to the arms.

4. The combination of a mast, acap on the mast, guys attachedto. the cap at one end and to anchors at the other end, turnb'uckles in the guys, a sleeve vertically movable on the mast, upper .and lower flanges on the sleeve, radial arms attached to the lower flanges, braces connecting the upper flange and the arms, a Windlass mounted on the sleeve, hoisting-tackle connecting the sleeve and cap and wound upon the Windlass, brackets attached to thear-zns, and molds attached to the brackets.

5. The combination of a mast, means for supporting the mast,- a sleeve vertically adjustable on the mast,- radial arms attached tothe sleeve, inner and outer brackets radially adjustable; on the arms, inner and outermolds attached to the brackets, and. a middle mold attached to the arms.

6. The combination of a mast, a sleeve vertically adjustable on the mast, radial arms attached to the sleeve, inner and outer molds connected to thearms, and a middle mold also connected to the arms and having recesses 111 lts lower edge to receive bondingirons.

7. The combination of a mast, a sleeve.

vertically adjustable on vthe mast, radial arms attached to the sleeve, inner and outer molds connected to the arms, and' reels mounted 'on the arms tosupply vertical bonding material to the walls formed by the molds.

8. The combination of a mast, means for supporting the mast, a sleeve vertically movable on the mast, radialarms attached to the sleeve, brackets radially adjustable on the arms and having hinges at their respective angles, and molds supported by brackets, said molds being formed of overlapping sections, slots in the. outer overlapping portions of the molds, and bolts in the inner overlapping portions and adjustable in the slots.

' 9. The combination of a mast, means for supporting the mast, a sleeve'vertically adjustable on the mast, radiaharms attached to the sleeve, molds supported by the arms, a transverse bar engaging one side of the mast, a clip in the bar and oppositely engaging the mast, stays attached to the bar and extending outward to support a casing.

10. The combination of a mast, a sleeve vertically adjustable on the mast, radial arms attached to the sleeve, inner and outer molds connected to the arms, one of said molds having vertical recesses at intervals to receive studding or strips.

" In testimony whereof I alfix my signature in presence of two witnesses.

JOHN PRESTON.

Witnesses: LUTHER V. MoUL'rox, PALMER A. JoNns. 

